Drill-bit oiler.



Patented Aug. 28, 1917.

'2 SHEETS-SHEET 1.

N. Y. LLOYD.

omu an (men APPLICATION flLED OCT- 25. l9I 6- I JPatnted Ali'g; 28, 1917.

NELSON V. LLOYD, OF RALSTON, WASHINGTON.

DRILL-BIT OILER.

Specification of Letters Patent.

Patented A11 28., 1917.

Application filed 0ctobc125, 1916. Serial No. 127,697.

T 0 all whom it may concern:

Be it known that I, NnLsoN V. LLorn, a citizen of the United States, and a'resident of Ralston, in the county of Adams and State of Vashington, have invented a certain new and useful Improvement in DrillBit Oilers, of which the following is a specification.

The present invention relates to the art of lubrication, and has particular reference to an oiler adapted to apply a lubricant to drill bits, and the like.

It is an object of the present invention to provide an oiler of this character which may be detachably mounted directly upon the drill bit or its supporting chuck, and wherein the lubricant is fed to the drill bit during its turning, so as to prevent the un due heating of the drill bit and to insure the more rapid boring with the same.

It is another object of this invention to provide an oiler which may be directly applied to the drill bit, and which has means permitting the manual control of the oil supply to the bit so that should an excess amount of oil be required at certain intervals, the same may be quickly released from the oiler and applied to the bit.

The invention further aims at the provision of an oiler of this character which is relatively small and compact, and which may be applied to post drilling machines of the usual construction without interfering with the various adjustments of the same, or the operation of the drill bit.

The above, and other objects and advantages of this invention will be more fully brought out in the following detailed description of the present preferred embodiment of the invention, the same being illustrated in the accompanying drawings wherein:

Figure 1 is a side elevation of a post drill having an oiler constructed according to the present invention applied to the drill bit thereof.

Fig. 2 is an enlarged edge elevation of the ,oiler, showing a portion of the bit secured therein.

Fig. 3 is a horizontal section through the same taken. on the line 33 of Fig. 2.

Fig. 4 is a transverse section taken on the line 44 of Fig. 3.

Fig. 5 is a detail enlarged section taken longitudinally through the turning plug controlling the direct flow of the lubricant to the drill bit;

Fig. 6 is a side elevation of a portion of a post drill, having a modified form of the oller applied thereto, and shown partly in section.

Fig. 7 is an enlarged vertical section taken centrally through the modified form of oiler.

Fig. 8 is a transverse section taken 011 the line SS of Fig. 7, showing the outlet valves and the controlling means therefor.

Fig. 9 is a detail perspective View of one of the spacing strips comprising part of the oiler.

Fig. 10 is a detail perspective view of one of the slide valves.

Referring to these drawings, wherein like parts are designated by similar characters of reference throughout the several views, and referring first to the form shown in F 1 to 5, inclusive, A designates one type of post drill provided in the usual manner with a drill bit B. The oiler comprises a flat substantially circular casing 15 constructed with an opening or recess in one side which radiates from the central portion of the casing to form the same substantially U-shape in cross-section, horizontally. This recess in the side of the casing 15 provides a receiving throat 16 through which the bit B is adapted to be passed when the casing 15 is applied. The casing 15 is provided, at the inner end of the throat 16, with a dovetail recess into which is dove-tailed the intermediate portion of the spring 17, the opposite arms of which project outwardly into the throat 16 and are oppositely bowed away from each other to form a resilient socket for binding engagement about the drill bit B to support the casing 15 thereon. The outer extremities of the spring 17 are flared away from each other to provide guiding lips 18 adapted to engage the drill bit B and direct the same into the space be tween the jaws of the spring 17. One end of the cylinder 15, at one side of the throat 16, is provided with a radially oifset pocket 19, the outer wall 20 of which extends tangentially from the outer wall of the casing 15. The end .wall of the pocket 19 is relatively thick, and is provided therein with a downwardly inclined oil passage 21 which opens at its upper end through the inner face of said thick wall into the pocket to receive oil from the top of the pocket when the latter is raised therein by centrifugal force. The passage 21, inclines downwardly and inwardly, and is provided with an inwardly extending branch passage 22 formed in the adjacent wall 23 at one side of the throat 16. This branch passage 23 is also inclined downwardly and opens at its lower inner end to receive the adjacent jaw of the spring 17, and directly opposite to the bit B. The end wall of the pocket 19 is provided therein with a valve 24. traversing the passage 21 to control the flow of lubricant downwardly therethrough. The branch passage 22 is provided therein with a turn ing plug 25 having the transverse opening 26 therein adapted to be turned normally into position to register with the passage 22, and which is provided with an angular passage 27 which leads from the inner end of the plug 25 and through one side thereof at substantially right angles to the transverse passage 26. The inner end of the turning plug 25 opens into the interior of the casing 15, and when the plug 25 is turned in the wall 23, the passage 27 may be made to register with the passage 22, at the lower side thereof to permit the direct flowing of the lubricant from the casing 15 to the bit B. Oil may be introduced into the casing 15 through an opening in the top thereof which is normally closed by a detachable cap 28. 7

When it is desired to use this form of oiler, the casing 15 is lifted bodily and engaged laterally over the drill bit B. The spring jaws of the spring 17 snap over the opposite side of the drill bit and by their frictional engagement therewith support the casing 15 upon the drill bit and for rotation therewith. The turning of the drill bit B causes the lubricant in the casing 15 to flow, by centrifugal force, into the pocket 19. As the lubricant rises in the pocket 19, it flows through the passage 21, and gravitates therein to the branch passage 23, and from such passage is delivered to the top of the bit B. The flow of oil gravitating through the passages 21 and 22, may be regulated by turning the valve 24L to move the transverse opening thereof more or less out of registry with the main passage 21. l/Vhen the drill bit B is at rest, and it is desired to supply a quantity of oil thereto,

it is only necessary to turn the plug 25 to bring the lateral outlet of the passage 27 into register with the lower end of the inclined passage 23, when the oil will flow freely from the casing 15 onto the bit B. It will be noted from Fig. 2, that the turning plug 25 is located adjacent to the bottom of the casing 15 so that should the casing be only partially filled with oil the same will gravitate to the bit B.

In the second embodiment of the present invention, disclosed in Figs. 6 to 10 inclusive, the casing comprises a pair of inner and outer cylinders 15 and 15, which are concentrically arranged, and are of different diameters to provide therebetween an annular chamber or'oil-receiving space. The cylinders are preferably held in this concentric relation by means of crimped or corrugated facing strips 29. The I inner cylinder 15 is adapted to fit snugly over the chuck or socket C of the post drill A. The upper edge of the cylinder 15 may be turned inwardly over the top of the chuck C to support the oiler on the chuck. A radially extending opening 30 is formed through one side of the oiler casing to receive therethrough the usual set screw 31 for retaining the drill bit B in the chuck C.

The modified form of oiler casing is provided with a relatively thick bottom 32 which is centrally apertured to receive the bit B therethrough, and which is provided, at opposite sides of the central cylinder 15, with outlet openings 33 and 341-. Pipes or nozzles 35 are fitted at their upper ends in the lower ends of the openings 33 and 34,

the lower ends of the nozzle 35 terminating adjacent to the opposite sides of the drill bit B to feed the lubricant to the latter. The bottom 32 is provided in its opposite edges, with a pair of radially extending mortises or slots into which is fitted a pair of feed-control valves,indicated at 36 and 37 in the drawings. These valves 36 and 37 are adapted to slide radially in the bottom 32, and are provided, intermediate their ends, with openings or recesses 38 adapted to be brought into register with the openings 33 and 3 1 to permit the free flow of oil downwardly therethrough from the easing. A thumb lever 39 is pocketed in the edge of the bottom 32 directly opposite to the slide valve 36, and has pivotal connection with the outer end thereof. The thumb lever 39 is pivoted to the bottom 32 upon a pin 4:0, and has one outer free end projecting substantially at a tangent from the edge of the bottom 32. The inner end of the thumb lever 39, beyond the pivot 40, bears against the outer end of a spring 11 which is seated in a recess 12 formed in the bottom 32. The spring 4L1 normally urges the thumb lever 39 outwardly, and draws the slide valve 36 therewith to close the opening 33. When desired, the thumb lever 39 may be swung inwardly to move the valve 36 and bring the recess 38 thereof into registry with opening 33. The oil is now permitted to flow down from the casing through the nozzle 35 to the bit B.

At the opposite side of-the bottom 32, an automatically operated lever 12 is pocketed in the edge of the bottom. The lever is pivoted intermediate its ends upon a pin 13 carried by the bottom 32, and has along arm pivotally connected to the slide valve 37. On the outer end of said long'arm a weight 44. is formed, the weight being sock eted in the edge of the bottom 32, and being adapted to move radially outward by centrifugal force upon the turning of the casing, against the tension of a spring 45 which bears against the shorter arm of said lever 42, and lies in a pocket 46 formed in the bottom. Normally, the slide valve 37 is held by the spring in position to close the opening 34. When the lever 42 is swung outwardly, by the centrifugal action on the weight 44 of the lever, and the device is rotated, the slide valve 37 is drawn therewith and the recess 38 thereof is brought into registry with the opening 34 and oil is permitted to flow from the casing downwardly through the nozzle 35.

The oil, or other lubricant used, may be poured in any suitable manner in the upper open end of the casing. It is preferred, however, to provide a supply tank 47 which may be mounted upon the post drill A, at a height above the chuck C thereof, and provided with a downwardly extending hingedly connected feed pipe 48. The lower end of the feed pipe 48 is provided with a vertically extending T-head 49, the lower end of which projects into the annular space between the cylinders or walls of the casing. A float valve 50 is arranged at the lower end of the T-heaol 49, and has a retaining stem 51 which slidably engages through the head 49, and may be overturned or otherwise formed to hold the float valve 50 in the head when the surface level of the oil in the casing drops to a considerable extent. A cover plate or disk 52 is fitted over the top of the casing and is provided in one side with an opening through which the lower end of the head 49 is adapted to project.

lVhen oil from the supply tank 47 flows through the pipe 48 and fills the receptacle on the chuck, the weight or float 50 is raised and the valve is closed to shut off the supply of oil, and is held closed until the surface level in the casing drops sufficiently to allow the float 50 to move down and open the valve. By this means, a predetermined quantity of the lubricant is retained in the casing, and the desired oil pressure is had through the outlet openings 33 and 34 when the valves 36 and 37 are operated.

It is of course understood that it is within the scope of this invention to change and modify the above-specifically described embodiments of this invention to adapt the same to post drills of various types, and to chucks of various sizes and lengths, without departing from the scope of the following claims.

I claim:

1. In a lubricator, the combination of a receptacle having a gravity-feeding oil conduit, securing means for holding the receptacle upon a drill bit with the conduit opening adjacent to the side of the bit to supply oil by gravity to the latter, and means operable by the rotation of the bit for supplying oil from the receptacle to the conduit.

2. In a lubricator, a receptacle, securing means for holding the receptacle upon a drill bit, and automatic oil-feeding means carried by the receptacle and including a valve adapted to be opened by the turning of the bit to supply oil to the latter.

3. In a lubricator, a receptacle, means for holding the receptacle upon a drill bit, oilconducting means carried by the receptacle adapted to deliver oil therefrom to the bit, and a centrifugally actuated valve for autoglatically controlling the flow of oil to the 4. In a lubricator, a receptacle, means for securing the receptacle for rotation with the bit, valved means actuated by centrifugal force for releasing oil from the receptacle, and feeding means associated with said receptacle to receive oil therefrom and feed the latter by gravity to the bit.

5. In a lubricator, a receptacle adapted to contain a lubricant, nozzles leading from the bottom of said receptacle, means for supporting the receptacle upon the chuck of a post drill to dispose said nozzles adjacent to said drill bit, valves located in the bottom of said receptacle and adapted to control the passage of lubricant through said nozzles, and means carried by said receptacle for operating said valves.

6. In a lubricator, the combination of a pair of concentric cylinders, a bottom connecting said cylinders and providing therebetween an annular oil-receiving chamber, said bottom having openings therethrough, valves mounted in said bottom for controlling the passage of oil through said openings, a weighted lever connected to one of said valves and adapted to open the same by centrifugal force upon the turning of the cylinders, and a thumb lever hinged upon said bottom and connected to the opposite valve to permit the opening and closing of the same by hand.

7. In a lubricator, the combination of a receptacle adapted to be supported upon a drill bit, said receptacle being provided with an annular oil-receiving chamber, nozzles leading from the lower end of the receptacle, a feed pipe opening into one side of said annular chamber, and a float valve arranged in the chamber adapted to close the open end of said feed pipe upon the filling of the receptacle to a predetermined height.

NELSON V. LLOYD.

Gopies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Eatenta, Washington, D. G. 

